CIW 1D0-735 問題集

質問 1：
Which of the following will correctly declare the courseNumber variable as a siring data type?
A. var courseNumber = ''JS101'';
B. var_courseNumber = JS101'';
C. var courseNumber = JS101;
D. var courseNumber = ''JS101'';
正解：B

質問 2：
Considering the following code:
Var 1 ;
For (I = 1; I < 10; I ++)
What part of the code fragment initializes the counter variable?
A. i++
B. i = 1;
C. Var 1;
D. i < 10;
正解：B

質問 3：
Scarlet has the following code in her script:
Var namesArr =[''Joseph',' Charlotte'', ''Nicole''];
She wants to add the name Hank to the end of the array so that its length is 4. What code should she use?
A. namesArr push (''Hank'');
B. namesArr unshift (''Hank'');
C. namesArr .shift (''Hank'');
D. namesArr [4] ''Hank'';
正解：C

質問 4：
Consider the following two code segments:

Which of the following is true about these code segments?
A. The code in both segments will not execute at all
B. The code in Segment 1 will execute one time
C. The code in Segment 2 will execute one time
D. The code in both segments will cause an infinite loop
正解：B

質問 5：
Which of the following is a true statement regarding the relationship between Promises and callback functions?
A. A Promise is an object a developer can use to pass callbacks to functions.
B. A Promise is used to monitor the value of a variable A callback retrieves the previous value of a variable.
C. A Promise cannot be used in conjunction with a callback.
D. A Promise is a returned object to which the developer can attach callbacks instead of passing callbacks to a function.
正解：D